Add benchtests for trunc and truncf.

This patch adds benchtests for the trunc and truncf functions.  The
inputs listed are fairly arbitrary; I do not assert they are
representative of any particular application.

	* benchtests/Makefile (bench-math): Add trunc and truncf.
	(CFLAGS-bench-trunc.c): New variable.
	(CFLAGS-bench-truncf.c): Likewise.
	* benchtests/trunc-inputs: New file.
	* benchtests/truncf-inputs: Likewise.

ChangeLog

@@ -1,3 +1,11 @@
+2017-09-19  Joseph Myers  <joseph@codesourcery.com>
+
+	* benchtests/Makefile (bench-math): Add trunc and truncf.
+	(CFLAGS-bench-trunc.c): New variable.
+	(CFLAGS-bench-truncf.c): Likewise.
+	* benchtests/trunc-inputs: New file.
+	* benchtests/truncf-inputs: Likewise.
+
 2017-09-19  Rajalakshmi Srinivasaraghavan  <raji@linux.vnet.ibm.com>
 
 	* sysdeps/powerpc/powerpc64/power8/memset.S: Avoid misaligned stores.

benchtests/Makefile

@@ -23,7 +23,7 @@ subdir := benchtests
 include ../Makeconfig
 bench-math := acos acosh asin asinh atan atanh cos cosh exp exp2 log log2 \
 	      modf pow rint sin sincos sinh sqrt tan tanh fmin fmax fminf \
-	      fmaxf powf
+	      fmaxf powf trunc truncf
 
 bench-pthread := pthread_once thread_create
 
@@ -76,6 +76,8 @@ CFLAGS-bench-fmin.c += -fno-builtin
 CFLAGS-bench-fminf.c += -fno-builtin
 CFLAGS-bench-fmax.c += -fno-builtin
 CFLAGS-bench-fmaxf.c += -fno-builtin
+CFLAGS-bench-trunc.c += -fno-builtin
+CFLAGS-bench-truncf.c += -fno-builtin
 
 bench-malloc := malloc-thread
 

benchtests/trunc-inputs

@@ -0,0 +1,22 @@
+## args: double
+## ret: double
+## includes: math.h
+0.0
+-0.0
+0.001
+-0.001
+0.5
+-0.5
+0.999
+-0.999
+1.0
+-1.0
+1.001
+-1.001
+123.5
+-123.5
+12345.1
+-1000000.1
+1e15
+-1e30
+1e200

benchtests/truncf-inputs

@@ -0,0 +1,21 @@
+## args: float
+## ret: float
+## includes: math.h
+0.0f
+-0.0f
+0.001f
+-0.001f
+0.5f
+-0.5f
+0.999f
+-0.999f
+1.0f
+-1.0f
+1.001f
+-1.001f
+123.5f
+-123.5f
+12345.1f
+-1000000.5f
+1e15f
+-1e30f